Blue Doors (also known as Blue Hatches) are doors that can be opened by any weapon. They are found in every Metroid game except Metroid II: Return of Samus, Metroid Fusion (replaced by a Blue Hatch) and Metroid: Other M (replaced by automatically opening doors). The blue color is actually the color of a force field covering the door. After shooting a blue-colored door, the energy covering it will disrupt and peel off or dissipate, depending on the model. The main purpose of the energy covering the blue doors is to avoid accidental/unintentional entries to rooms by wild creatures surrounding the area. This blocks off a large quantity of bioforms from access since most of them cannot manipulate weapons or simply don't have the means to produce an energy-based projectile.
In Metroid Prime 2: Echoes, the logic behind this design of door is explained by using the Scan Visor on a regular Blue Door. The extensive explanation is not given when scanning a black, white, or 'grey' door, instead, it only informs Samus of what types of weapons energy can interact with the field on those doors.
In Metroid Prime 3: Corruption, by scanning a Blue Door on Elysia (once inhabited by the Chozo), it is revealed that since the discovery of said planet, the Galactic Federation used the model of the Elysian blue door as a basis to all currently existing doors found throughout the galaxy on planets, ships, and stations under Federation control.
Super Metroid manualEdit
"These doors can be opened by Beams or Bombs."
Metroid: Zero Mission manualEdit
"These hatches can be opened with any of Samus' weapons."
Metroid Prime 2: Echoes temporary scanEdit
Metroid Prime 3: Corruption log bookEdit
Galactic Federation Blue DoorEdit
Bryyonian Blue DoorEdit
Elysian Blue DoorEdit
Space Pirate Blue DoorEdit
- In a collection of Scan Visor panels in Metroid Prime, there appears to be an unused scan of a Blue Door that heavily resembles the Super Metroid sprites. Doors are unscannable in Prime, except for the doors on the Frigate Orpheon when Samus first enters it. When Samus scans the doors, the scan will tell Samus which room the door leads to. The reason for this is unknown, and no other doors have similar scans.
- In Super Metroid, even though Blue Doors can be opened with any weapon, they don't open with Power Bombs. However, in the game's coding, it appears there is a function that allows Blue Doors to be opened with Power Bombs, as this is seen when using the Super Metroid Integrated Level Editor (SMILE), the game's level editor.
- The key of the Corruption map calls Blue Doors "Power Beam Doors" despite the fact that they can be opened with anything.
- The doors on Elysia and Tallon IV bear a striking resemblance to each other, likely because both areas were first colonized by the Chozo.
Blue doors often vary in size, shape and appearance, as demonstrated below.
|Red Door • Purple Door • White Door|
|Metroid Prime 2: Echoes|
|White hatch • Purple hatch • Gray hatch|
|Metroid Prime 3: Corruption|
|Green Door • Orange Door|
|Grey Hatch • Blue Hatch • Green Hatch • Yellow Hatch • Red Hatch|
|M/MZM, MP, MP2, MP3, MII, SM|
|Red Blast Shield • Green Hatch • Yellow Hatch • White Blast Shield • Multi-Lock Blast Shield • Mounted Blast Shield|
|Metroid Prime Hunters|
| Red Blast Shield • Green Blast Shield • Yellow Blast Shield • Purple Blast Shield • Orange Blast Shield • Brown Blast Shield|
Force Fields: Green • Yellow • Purple • Orange • Blue
|De-energized Door • Echo Gate • Leviathan Door • Light barrier • Metal Door • Phaaze Door • Sealed Door • Shutter • Special Hatch • Stronghold Door • Translator Door • Telekinetic barrier • Vault Door • Waste Disposal Unit|
|Gadora • Geron • Ing Webtrap • Webling • ULF 14 • ULF 36|